Linux-Hardware Digest #464, Volume #13 Tue, 22 Aug 00 17:13:10 EDT
Contents:
Re: pro's/contra's upgrading S3-ViRGE/DX/GX (2MB) to VooDoo3 3000(from 3dfx) with
16MB?, idea's? experiences? ("Jason")
Re: Recommended SCSI card for Zip Plus drive and RH6.1? (Andrey Vlasov)
Re: printing problem (Grant Taylor)
Re: hunting down a SCSI RAID controller (Andrey Vlasov)
Re: pro's/contra's upgrading S3-ViRGE/DX/GX (2MB) to VooDoo3 3000(from (paul van
duijn)
Re: Improve Rotational Delay of HDD with Software Only (Jeff Jonas)
----------------------------------------------------------------------------
From: "Jason" <Jason(AT)cyborgworkshop.com>
Subject: Re: pro's/contra's upgrading S3-ViRGE/DX/GX (2MB) to VooDoo3 3000(from 3dfx)
with 16MB?, idea's? experiences?
Date: Tue, 22 Aug 2000 15:28:01 -0500
Actually.. one of the most shocking tests, for the voodoo 3 3000 anyway, was
that the PCI version was marginally FASTER then the AGP version. You have
to remember, despite all the hype, PCI is right on par with AGP 1x and 2x.
This of course doesn't apply to AGP 4x with or without sidebands, but since
we are talking about a voodoo3, that really doesn't matter. Other then the
already stated increase in resolution and refresh rates for your 2D stuff,
you won't notice as much of a difference as you would if you were a gamer.
If nothing else, you will have pretty darn good support for OpenGL stuff
with the 3DFX card. (Mesa, etc). . I have a voodoo3 2000 in my test box
at home and have been very pleased with it. Just do yourself a favor and
make sure you have some fans or something blowing inside that box as the
voodoo 3 does double as a toaster oven. Good Luck.
--
Jason
www.cyborgworkshop.com
...and the geek shall inherit the earth...
------------------------------
From: Andrey Vlasov <[EMAIL PROTECTED]>
Subject: Re: Recommended SCSI card for Zip Plus drive and RH6.1?
Date: Tue, 22 Aug 2000 13:44:06 -0700
Hi Dave,
I have Tekram 315U 55CA$ and 390F 125CA$ and both works pretty well.
http://www.a-power.com
NOTE: Price in Canadian dollars.
Andrey
Dave Stanton wrote:
> "Simon Tomlinson" <[EMAIL PROTECTED]> wrote in message
> news:8nttca$kk2$[EMAIL PROTECTED]...
> > I currently run my Zip Plus drive connected to my PC parallel port
> > using RH6.1. However I can't use my printer off the same port. I have
> > considered putting in a second parallel port but would rather add a
> > Linux compatible SCSI card and run the zip plus off that. What is the
> > best (ie cheap and win9x RH6.1 Zip compatible) PCI SCSI card to use?
> >
> > Any suggestions
> >
> > Thanks
> >
> > Simon
>
> Don't know about cheap ( got mine s/h ) but have had good results from
> Advansys cards.
>
> Dave
------------------------------
From: Grant Taylor <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.setup
Subject: Re: printing problem
Date: Tue, 22 Aug 2000 20:51:35 GMT
Alexis Bilodeau <[EMAIL PROTECTED]> writes:
> I have a problem setting up an Optra E+ laser printer under Mandrake 7.0
> with PDQ. I use pdq 2.2.1 with the pdq-o-matic driver for this printer.
> It prints Postscript files only with xpdq, but I can't print from any
> other program, nor can I print other types of file.
> Does someone know what could be the problem?
Sure. I have not yet written the code to put ascii or other handling
into the PDQ files. In the meantime, you can simply print everything
via postscript. It's not quite as fast, but it'll work.
You should be able to print fine from other programs by specifying a
suitable pdq command or just xpdq instead of lpr.
--
Grant Taylor - gtaylor@picante<dot>com - http://www.picante.com/~gtaylor/
Linux Printing HOWTO and Website: http://www.linuxprinting.org/
I offer consulting in most things Unix/Linux/*BSD/Perl/C/C++
------------------------------
From: Andrey Vlasov <[EMAIL PROTECTED]>
Subject: Re: hunting down a SCSI RAID controller
Date: Tue, 22 Aug 2000 14:01:23 -0700
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Hi there,
check links and some posts from this newsgroup I hope that you will find it
usefull
Andrey
=====================================================
http://www.3ware.com/products/linux3ware.shtml
http://www.control.auc.dk/~danji/ft66.html
=====================================================
Hi there,
I guess that you can not use this system for RAID. As I understood you plan to
use IDE Ultra66 controller. This controller has only two IDE channels which in
it's own order allow connect only two master drives. Only master drives should
be used for RAID. Best what you can to do use two controllers to get 4 master
IDE drives. You can not use master and slave drives by reason that one of two
drives will wait for another - what will decrease performance. If your data
critical you have to use RAID5 and it suppouse to have at least 3 drives.
http://www.linuxdoc.org/HOWTO/Software-RAID-HOWTO.html
is good place to start read.
Andrey
=====================================================
Hi,
I actually use 5 AMI Megaraid Cards on 5 different server (HP LH3 and
HP E60 servers with RedHat 6.0) since 01/01/2000 and I've encoutered
neither errors nor difficulties to install them.
Sebastien
[EMAIL PROTECTED] wrote:
> Hi there,
>
> Does anyone know wich raidcontoler best to use for raidlevel 5?
> I've got to configure a system for medical data and our custumer
> want's to be sure no data gets lost. I'm planing to use RH6.2.
>
> Thanx in advance,
>
> Kees
=====================================================
These worked for me. I believe the Promise U/33 card has since been retired
and current products are Ultra/66 and/or /100.
ide0/1, IRQ 14/15 - standard motherboard
ide2/3, IRQ 7 - Promise Ultra/33 (disabled printer interrupt in BIOS)
Setup 1, RAID 0 ~ 1.8X single disk performance, massive space (these were
6.4MB IBM drives and I couldn't afford cutting edge 8GB :) Even though the
U/33 used only a single interrupt, it outperformed the onboard Intel PIIX4
by 3-4% on single drive r/w tests.
ide0 = system disk
ide1 = CD, CDR
ide2/Mas + ide3/Mas = /dev/md0 (~12GB)
ide2/Sla + ide3/Sla = /dev/md1 (~12GB
Setup 2 was put up only for a day as an exercise, 3-disk RAID 5
ide0 = system disk, CD
ide1/Sla = CDR
ide1/Mas + ide2/Mas + ide3/Mas = /dev/md0 (~12GB)
Note that something like a 4-disk RAID anything on a single Promise would
get about 1/2 single disk performance due to ide channel contention. You
don't disable the onboard ide.
If I was building a cheap storage server, I'd get 3 Promise cards and use
ide1 from the motherboard.
(http://www.centralcomputer.com/PriceList/Hardware/Controllers.htm)
DTLA-307045 45GB UATA/100 7200rpm............$289
Promise UATA/100 IDE PCI.....................$55
7 IDE drives = $2023
3 Ultra/100 = $ 165
$2183
a) 7-drive RAID 5 (hot spare on ide1), = 225GB = $9.70/GB
b) 7-drive RAID 5 (no hot spare) = 270GB = $8.08/GB
> I want to add two more identical drives, and set them up in a RAID array
> (RAID 5?), but I'm not sure how to proceed ... or if it can be done ...
> without a complete rebuild on the system.
You can add the controllers & drives, add raid support and make the raid set
with no more issues than adding and partitioning standard drives.
> If I have to do a rebuild/reinstall, would it make sense to go with an EIDE
> RAID controller (disable the onboard), or just bite the big one and install
> SCSI controllers & drives ($$$$$!)
I'll leave the above a) & b) using SCSI as an exercise. Remember you'll
need 2 controllers to get any sort of performance and that RAID 5 always
uses one drive n the set as parity.
--
timothymoore
bigfoot
com
=====================================================
[EMAIL PROTECTED] wrote:
> Has anyone tried to install the /boot partition on a RAID? I noticed
> that this is not supported in the RedHat compatiblity notes.
> It seems to me that a hardware RAID controller would enable /boot to
be
> installed on a RAID.
I have a DPT SmartRAID V that I'm using for all of the disks on a RedHat
6 system. Works beautifully, although it did require a module on
install.
> Has anyone tried this on a ICP/Adaptec RAID system?
Well, DPT has been purchased by Adaptec, so, sort of. If you're
thinking of the AAA cards, DON'T BUY ONE. They are just a fancy SCSI
controller, they DO NOT do hardware RAID. They have drivers for NT and
Netware that allow you to boot from the controller, but it's SOFTWARE
RAID. Get a DPT card, Mylex, or AMI card. All have Linux drivers, and
are real hardware RAID controllers.
Greg
--
Troll, troll, troll your post
Gently down the feed
Merrily, merrily troll along
A life is what you need...
Nicked from MAWA on the gnome-list
=====================================================
[EMAIL PROTECTED] wrote:
>
> [EMAIL PROTECTED] writes:
>
> > Has anyone tried to install the /boot partition on a RAID? I noticed
> > that this is not supported in the RedHat compatiblity notes.
> > It seems to me that a hardware RAID controller would enable /boot to be
> > installed on a RAID.
> > Has anyone tried this on a ICP/Adaptec RAID system?
>
> If your array controller has INT13 hooks, you should be able to use
> LILO on it. (I have never gotten this to work, but I've been told by
> numerous people that it is both possible and trivial.) If Linux has
> support for your controller, you should be able to install LILO on
> it.
>
> > I'm new to Linux with RAID. If this isn't possible I'm assuming that
> > /boot installed on a separate disk from the RAID devices.
>
> I've found that getting an operating system to boot off a SCSI drive
> - much less an array - is more trouble than it's worth. Far easier to
> get an old IDE drive, partition only the first 1024 cylinders, and
> boot from that.
Hmmm.... I've never had a problem booting from SCSI drives. I've even
booted from SCSI with an IDE drive attached. Really no problem. As
for RAID, I'm using an Mylex Acceleraid set up with RAID5 4x10K 9.1 IBM
drives set up with two partions (due to 1024 cycl limit); one for /boot
and one for /root. This boots just fine. I use RH 6.2 and it installed
right out of the box. This should work for any hardware raid and it sets
up just like anything else. My lilo.conf looks like this:
boot=/dev/rd/c0d0 <- this is the raw drive
map=/boot/map
install=/boot/boot.b
serial="0,9600n8"
prompt
timeout=50
message=/etc/lilo.message
image=/boot/vmlinuz-2.2.16
label=l2216
append="console=ttyS0,9600"
read-only
root=/dev/rd/c0d0p2 <- this is the /root
/boot is on /dev/rd/c0d0p1
The second SCSI controller is an Adaptec:
Swap is on /dev/sda1 - 10K 4G Seagate
Another ext2 file system /dev/sda2
Yet Another ext2 file system /dev/sdb1
Note that the Mylex DAC960 driver is not SCSI, but a block device which is
much more efficient and that it has a different set of device names.
Also, while RH did install just fine, it did not get the 1st lilo.conf line
(raw drive) correct. It tried to put it on /dev/sda (boo hiss)
Best
Cokey
--
==================================================================
Cokey de Percin, DBA Email:
Policy Management Systems Corp. Work - [EMAIL PROTECTED]
Columbia, South Carolina Home - [EMAIL PROTECTED]
Vik Heyndrickx wrote:
> Hi,
>
> I'm looking for a PCI __RAID__ U2W-SCSI (160/m) host adapter, which is
> beyond any problem supported by a recent linux 2.2 kernel.
>
> If anyone could share his experiences about his SCSI RAID controller, I'd
> greatly appreciate it. These hardware are quite expensive, and I cannot risk
> buying something I might be unable to use with a decent operating system.
>
> Last time I looked, all RAID solutions from Adaptec were unsupported by
> linux, and from what I've been told, they never will, so it will have to be
> a different brand I suppose...
>
> Thanks,
>
> --
> Vik
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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
<tt>Hi there,</tt><tt></tt>
<p><tt>check links and some posts from this newsgroup I hope that you will
find it usefull</tt><tt></tt>
<p><tt>Andrey</tt><tt></tt>
<p><tt>-----------------------------------------------------</tt>
<br><tt><A
HREF="http://www.3ware.com/products/linux3ware.shtml">http://www.3ware.com/products/linux3ware.shtml</A></tt>
<br><tt><A
HREF="http://www.control.auc.dk/~danji/ft66.html">http://www.control.auc.dk/~danji/ft66.html</A></tt>
<br><tt>-----------------------------------------------------</tt>
<br><tt>Hi there,</tt><tt></tt>
<p><tt>I guess that you can not use this system for RAID. As I understood
you plan to use IDE Ultra66 controller. This controller has only two IDE
channels which in it's own order allow connect only two master drives.
Only master drives should be used for RAID. Best what you can to do use
two controllers to get 4 master IDE drives. You can not use master and
slave drives by reason that one of two drives will wait for another - what
will decrease performance. If your data critical you have to use RAID5
and it suppouse to have at least 3 drives.</tt><tt></tt>
<p><tt><A
HREF="http://www.linuxdoc.org/HOWTO/Software-RAID-HOWTO.html">http://www.linuxdoc.org/HOWTO/Software-RAID-HOWTO.html</A></tt><tt></tt>
<p><tt>is good place to start read.</tt><tt></tt>
<p><tt>Andrey</tt>
<br><tt>-----------------------------------------------------</tt>
<br><tt>Hi,</tt><tt></tt>
<p><tt>I actually use 5 AMI Megaraid Cards on 5 different server
(HP LH3 and</tt>
<br><tt>HP E60 servers with RedHat 6.0) since 01/01/2000 and I've encoutered</tt>
<br><tt>neither errors nor difficulties to install them.</tt><tt></tt>
<p><tt>Sebastien</tt><tt></tt>
<p><tt>[EMAIL PROTECTED] wrote:</tt><tt></tt>
<p><tt>> Hi there,</tt>
<br><tt>></tt>
<br><tt>> Does anyone know wich raidcontoler best to use for raidlevel
5?</tt>
<br><tt>> I've got to configure a system for medical data and our custumer</tt>
<br><tt>> want's to be sure no data gets lost. I'm planing to use RH6.2.</tt>
<br><tt>></tt>
<br><tt>> Thanx in advance,</tt>
<br><tt>></tt>
<br><tt>> Kees</tt>
<br><tt>-----------------------------------------------------</tt>
<br><tt>These worked for me. I believe the Promise U/33 card has
since been retired</tt>
<br><tt>and current products are Ultra/66 and/or /100.</tt><tt></tt>
<p><tt>ide0/1, IRQ 14/15 - standard motherboard</tt>
<br><tt>ide2/3, IRQ 7 - Promise Ultra/33 (disabled
printer interrupt in BIOS)</tt><tt></tt>
<p><tt>Setup 1, RAID 0 ~ 1.8X single disk performance, massive space (these
were</tt>
<br><tt>6.4MB IBM drives and I couldn't afford cutting edge 8GB :)
Even though the</tt>
<br><tt>U/33 used only a single interrupt, it outperformed the onboard
Intel PIIX4</tt>
<br><tt>by 3-4% on single drive r/w tests.</tt><tt></tt>
<p><tt>ide0 = system disk</tt>
<br><tt>ide1 = CD, CDR</tt>
<br><tt>ide2/Mas + ide3/Mas = /dev/md0 (~12GB)</tt>
<br><tt>ide2/Sla + ide3/Sla = /dev/md1 (~12GB</tt><tt></tt>
<p><tt>Setup 2 was put up only for a day as an exercise, 3-disk RAID 5</tt><tt></tt>
<p><tt>ide0 = system disk, CD</tt>
<br><tt>ide1/Sla = CDR</tt>
<br><tt>ide1/Mas + ide2/Mas + ide3/Mas = /dev/md0 (~12GB)</tt><tt></tt>
<p><tt>Note that something like a 4-disk RAID anything on a single Promise
would</tt>
<br><tt>get about 1/2 single disk performance due to ide channel contention.
You</tt>
<br><tt>don't disable the onboard ide.</tt><tt></tt>
<p><tt>If I was building a cheap storage server, I'd get 3 Promise cards
and use</tt>
<br><tt>ide1 from the motherboard.</tt>
<br><tt>(<A
HREF="http://www.centralcomputer.com/PriceList/Hardware/Controllers.htm">http://www.centralcomputer.com/PriceList/Hardware/Controllers.htm</A>)</tt><tt></tt>
<p><tt>DTLA-307045 45GB UATA/100 7200rpm............$289</tt>
<br><tt>Promise UATA/100 IDE PCI.....................$55</tt><tt></tt>
<p><tt>7 IDE drives = $2023</tt>
<br><tt>3 Ultra/100 = $ 165</tt>
<br><tt>
$2183</tt><tt></tt>
<p><tt>a) 7-drive RAID 5 (hot spare on ide1), = 225GB = $9.70/GB</tt>
<br><tt>b) 7-drive RAID 5 (no hot spare)
= 270GB = $8.08/GB</tt><tt></tt>
<p><tt>> I want to add two more identical drives, and set them up in a
RAID array</tt>
<br><tt>> (RAID 5?), but I'm not sure how to proceed ... or if it can be
done ...</tt>
<br><tt>> without a complete rebuild on the system.</tt><tt></tt>
<p><tt>You can add the controllers & drives, add raid support and make
the raid set</tt>
<br><tt>with no more issues than adding and partitioning standard drives.</tt><tt></tt>
<p><tt>> If I have to do a rebuild/reinstall, would it make sense to go
with an EIDE</tt>
<br><tt>> RAID controller (disable the onboard), or just bite the big one
and install</tt>
<br><tt>> SCSI controllers & drives ($$$$$!)</tt><tt></tt>
<p><tt>I'll leave the above a) & b) using SCSI as an exercise.
Remember you'll</tt>
<br><tt>need 2 controllers to get any sort of performance and that RAID
5 always</tt>
<br><tt>uses one drive n the set as parity.</tt><tt></tt>
<p><tt>--</tt>
<br><tt>timothymoore</tt>
<br><tt> bigfoot</tt>
<br><tt> com</tt>
<br><tt>-----------------------------------------------------</tt>
<br><tt> [EMAIL PROTECTED] wrote:</tt>
<br><tt>> Has anyone tried to install the /boot partition on a RAID?
I noticed</tt>
<br><tt>> that this is not supported in the RedHat compatiblity notes.</tt>
<br><tt>> It seems to me that a hardware RAID controller would enable /boot
to</tt>
<br><tt>be</tt>
<br><tt>> installed on a RAID.</tt><tt></tt>
<p><tt>I have a DPT SmartRAID V that I'm using for all of the disks on
a RedHat</tt>
<br><tt>6 system. Works beautifully, although it did require a module
on</tt>
<br><tt>install.</tt><tt></tt>
<p><tt>> Has anyone tried this on a ICP/Adaptec RAID system?</tt><tt></tt>
<p><tt>Well, DPT has been purchased by Adaptec, so, sort of. If you're</tt>
<br><tt>thinking of the AAA cards, DON'T BUY ONE. They are just a
fancy SCSI</tt>
<br><tt>controller, they DO NOT do hardware RAID. They have drivers
for NT and</tt>
<br><tt>Netware that allow you to boot from the controller, but it's SOFTWARE</tt>
<br><tt>RAID. Get a DPT card, Mylex, or AMI card. All have
Linux drivers, and</tt>
<br><tt>are real hardware RAID controllers.</tt>
<br><tt> Greg</tt><tt></tt>
<p><tt>--</tt>
<br><tt>Troll, troll, troll your post</tt>
<br><tt>Gently down the feed</tt>
<br><tt>Merrily, merrily troll along</tt>
<br><tt>A life is what you need...</tt>
<br><tt>Nicked from MAWA on the gnome-list</tt>
<br><tt></tt> <tt></tt>
<p><tt>-----------------------------------------------------</tt><tt></tt>
<p><tt>[EMAIL PROTECTED] wrote:</tt>
<br><tt>></tt>
<br><tt>> [EMAIL PROTECTED] writes:</tt>
<br><tt>></tt>
<br><tt>> > Has anyone tried to install the /boot partition on a RAID?
I noticed</tt>
<br><tt>> > that this is not supported in the RedHat compatiblity notes.</tt>
<br><tt>> > It seems to me that a hardware RAID controller would enable
/boot to be</tt>
<br><tt>> > installed on a RAID.</tt>
<br><tt>> > Has anyone tried this on a ICP/Adaptec RAID system?</tt>
<br><tt>></tt>
<br><tt>> If your array controller has INT13 hooks, you should be able
to use</tt>
<br><tt>> LILO on it. (I have never gotten this to work, but I've
been told by</tt>
<br><tt>> numerous people that it is both possible and trivial.)
If Linux has</tt>
<br><tt>> support for your controller, you should be able to install LILO
on</tt>
<br><tt>> it.</tt>
<br><tt>></tt>
<br><tt>> > I'm new to Linux with RAID. If this isn't possible I'm
assuming that</tt>
<br><tt>> > /boot installed on a separate disk from the RAID devices.</tt>
<br><tt>></tt>
<br><tt>> I've found that getting an operating system to boot off a SCSI
drive</tt>
<br><tt>> - much less an array - is more trouble than it's worth.
Far easier to</tt>
<br><tt>> get an old IDE drive, partition only the first 1024 cylinders,
and</tt>
<br><tt>> boot from that.</tt><tt></tt>
<p><tt>Hmmm.... I've never had a problem booting from SCSI drives.
I've even</tt>
<br><tt>booted from SCSI with an IDE drive attached. Really no problem.
As</tt>
<br><tt>for RAID, I'm using an Mylex Acceleraid set up with RAID5 4x10K
9.1 IBM</tt>
<br><tt>drives set up with two partions (due to 1024 cycl limit); one for
/boot</tt>
<br><tt>and one for /root. This boots just fine. I use RH 6.2
and it installed</tt>
<br><tt>right out of the box. This should work for any hardware raid
and it sets</tt>
<br><tt>up just like anything else. My lilo.conf looks like this:</tt><tt></tt>
<p><tt>boot=/dev/rd/c0d0
<- this is the raw drive</tt>
<br><tt>map=/boot/map</tt>
<br><tt>install=/boot/boot.b</tt>
<br><tt>serial="0,9600n8"</tt>
<br><tt>prompt</tt>
<br><tt>timeout=50</tt>
<br><tt>message=/etc/lilo.message</tt><tt></tt>
<p><tt>image=/boot/vmlinuz-2.2.16</tt>
<br><tt> label=l2216</tt>
<br><tt> append="console=ttyS0,9600"</tt>
<br><tt> read-only</tt>
<br><tt>
root=/dev/rd/c0d0p2
<- this is the /root</tt><tt></tt>
<p><tt>/boot is on /dev/rd/c0d0p1</tt><tt></tt>
<p><tt>The second SCSI controller is an Adaptec:</tt>
<br><tt> Swap is
on
/dev/sda1 - 10K 4G Seagate</tt>
<br><tt> Another ext2 file system
/dev/sda2</tt>
<br><tt> Yet Another ext2 file system /dev/sdb1</tt>
<br><tt></tt> <tt></tt>
<p><tt>Note that the Mylex DAC960 driver is not SCSI, but a block device
which is</tt>
<br><tt>much more efficient and that it has a different set of device
names.</tt><tt></tt>
<p><tt>Also, while RH did install just fine, it did not get the 1st lilo.conf
line</tt>
<br><tt>(raw drive) correct. It tried to put it on /dev/sda (boo
hiss)</tt><tt></tt>
<p><tt>Best</tt><tt></tt>
<p><tt>Cokey</tt><tt></tt>
<p><tt>--</tt>
<br><tt>------------------------------------------------------------------</tt>
<br><tt>Cokey de Percin,
DBA
Email:</tt>
<br><tt>Policy Management Systems Corp. Work - [EMAIL PROTECTED]</tt>
<br><tt>Columbia, South Carolina
Home - [EMAIL PROTECTED]</tt><tt></tt>
<p><tt>Vik Heyndrickx wrote:</tt>
<blockquote TYPE=CITE><tt>Hi,</tt><tt></tt>
<p><tt>I'm looking for a PCI __RAID__ U2W-SCSI (160/m) host adapter, which
is</tt>
<br><tt>beyond any problem supported by a recent linux 2.2 kernel.</tt><tt></tt>
<p><tt>If anyone could share his experiences about his SCSI RAID controller,
I'd</tt>
<br><tt>greatly appreciate it. These hardware are quite expensive, and
I cannot risk</tt>
<br><tt>buying something I might be unable to use with a decent operating
system.</tt><tt></tt>
<p><tt>Last time I looked, all RAID solutions from Adaptec were unsupported
by</tt>
<br><tt>linux, and from what I've been told, they never will, so it will
have to be</tt>
<br><tt>a different brand I suppose...</tt><tt></tt>
<p><tt>Thanks,</tt><tt></tt>
<p><tt>--</tt>
<br><tt>Vik</tt></blockquote>
<tt></tt></html>
==============D877425993CFB7F760B081DC==
------------------------------
From: paul van duijn <[EMAIL PROTECTED]>
Subject: Re: pro's/contra's upgrading S3-ViRGE/DX/GX (2MB) to VooDoo3 3000(from
Date: Tue, 22 Aug 2000 22:58:14 +0200
Jason wrote:
>
> Actually.. one of the most shocking tests, for the voodoo 3 3000 anyway, was
> that the PCI version was marginally FASTER then the AGP version. You have
> to remember, despite all the hype, PCI is right on par with AGP 1x and 2x.
> This of course doesn't apply to AGP 4x with or without sidebands, but since
> we are talking about a voodoo3, that really doesn't matter. Other then the
> already stated increase in resolution and refresh rates for your 2D stuff,
> you won't notice as much of a difference as you would if you were a gamer.
> If nothing else, you will have pretty darn good support for OpenGL stuff
> with the 3DFX card. (Mesa, etc). . I have a voodoo3 2000 in my test box
> at home and have been very pleased with it. Just do yourself a favor and
> make sure you have some fans or something blowing inside that box as the
> voodoo 3 does double as a toaster oven. Good Luck.
> --
> Jason
> www.cyborgworkshop.com
> ...and the geek shall inherit the earth...
Thanks for the advise people
P.v.Duijn
------------------------------
From: [EMAIL PROTECTED] (Jeff Jonas)
Crossposted-To:
comp.arch.storage,comp.periphs,comp.sys.ibm.pc.hardware.misc,comp.sys.ibm.pc.hardware.storage
Subject: Re: Improve Rotational Delay of HDD with Software Only
Date: 22 Aug 2000 17:06:05 -0400
>>> I invented a software technique that improves rotational delay of HDD
(only at reading). This technique makes HDD's rotational delay time half
(only at reading). It needs no additional hardware.
Load for CPU and memory is little.
>It would require a near OS rewrite. The software would have to know about
>the geometry of every different HD >MODEL & SIZE & FIRMWARE LEVEL<
>encountered. Further to make it work the driver would have to keep track in
>real time of the rotational position of the disks surface otherwise it's
>chose the slower version to read half the time.
I'm no expert on file systems but I'm on the way :-)
Except for the old disks (MFM, ESDI, SMD), all disks have buffers and
are usually given the freedom to delay writing data until they see
it as optimum. Other than a sync signal for spindle sync,
the buffering totally decouples the read/write operations from the
actual rotational position of the disk.
I know for a fact that the disks' "external geometry" is totally
fictional since the number of sectors per track varies.
That's why "IDE" disks list both the physical and logical geometry,
as well as offering Logical Block read/writes.
>This is of course frequently done already using spindle counter-synced
>hardware RAID 1(duplexed set) which requires little new software in the
>host.
That's an excellent point! "mirroring" could allow clever write
strategies so that the data can be read from the "closest" disk
(even taking advantage of the track buffering and other features),
as well as tolerating total failure of 1 disk.
No wonder that's so popular!
--
Jeffrey Jonas
jeffj@panix(dot)com
The original Dr. JCL and Mr .hide
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